I find it a little slow and laggy, and once it crashed my phone and I needed to do a battery pull. Looks like they are downloading the video to their own servers and doing an on the fly transcode?? maybe that's why none of the flash actually plays on the page, but you have to click on that video tab to see a list of all the flash stuff.
An option to play local flash video files would have been good. Definitely not default browser material, but with apps2sd and a 16gb card, it's worth to keep installed to try on flash sites and if it works it's a bonus.